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The complete chloroplast genome of Toxicodendron griffithii.

ABSTRACT: The whole chloroplast (cp) genome sequence of Toxicodendron griffithii has been characterized from Illumina pair-end sequencing. The complete cp genome was 159,613 bp in length, containing a large single-copy region (LSC) of 87,722 bp and a small single-copy region (SSC) of 18,911 bp, which were separated by a pair of 26,490 bp inverted repeat regions (IRs). The genome contained 132 genes (113 unique), including 87 protein-coding genes (80 unique), 37 tRNA genes (29 unique), and 8 rRNA genes (4 unique). The overall GC content of T. griffithii cp genome is 37.94%. Phylogenetic analysis of 14 chloroplast genomes within the family Anacardiaceae suggests that T. griffithii is closely related to genus Rhus and genus Pistacia.

SUBMITTER: Li Y

PROVIDER: S-EPMC7510646 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:BackgroundToxicodendron vernicifluum, belonging to the family Anacardiaceae, is an important commercial arbor species, which can provide us with the raw lacquer, an excellent adhesive and painting material used to make lacquer ware. Compared with diploid, triploid lacquer tree has a higher yield of raw lacquer and stronger resistance to stress. Triploid T. vernicifluum was a newly discovered natural triploid lacquer tree. However, the taxonomy of triploid T. vernicifluum has remained uncertain. Here, we sequenced and analyzed the complete chloroplast (cp) genome of triploid T. vernicifluum and compared it with related species of Toxicodendron genus based on chloroplast genome and SSR markers.ResultsThe plastome of triploid T. vernicifluum is 158,221 bp in length, including a pair of inverted repeats (IRs) of 26,462 bp, separated by a large single-copy region of 86,951 bp and a small single-copy region of 18,346 bp. In total, 132 genes including 87 protein-coding genes, 37 tRNA genes and 8 rRNA genes were identified in the triploid T. vernicifluum. Among these, 16 genes were duplicated in the IR regions, 14 genes contain one intron, while three genes contain two introns. After nucleotide substitutions, seven small inversions were analyzed in the chloroplast genomes, eight hotspot regions were found, which could be useful molecular genetic markers for future population genetics. Phylogenetic analyses showed that triploid T. vernicifluum was a sister to T. vernicifluum cv. Dahongpao and T. vernicifluum cv. Hongpigaobachi. Moreover, phylogenetic clustering based on the SSR markers showed that all the samples of triploid T. vernicifluum, T. vernicifluum cv. Dahongpao and T. vernicifluum cv. Hongpigaobachi in one group, while the samples of T. vernicifluum and T. succedaneum in another group, which is consistent with the cp genome and morphological analysis.ConclusionsThe current genomic datasets provide pivotal genetic resources to determine the phylogenetic relationships, variety identification, breeding and resource exploitation, and future genetic diversity-related studies of T. vernicifluum.

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The complete chloroplast genome of Toxicodendron griffithii.

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